More 8.1 info needed ...
#31
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Originally Posted by Jorday
I but some good break in miles on my truck before installing the juice, only like 1700 though. Seems like this engine takes a good while to fully break in because many people report fuel economy improving all the way up to 10k miles. I'm still waiting for my first 20+ mpg average for a tank, my best so far is only 18.
#32
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Yah, I'm sure the truck will make 20 mph next summer with summer diesel fuel and a good 15k on the engine. It does seem to me like the 285/75 BFG MTs decreased fuel economy slightly as I expected, but some people have reported improved fuel economy with larger than stock tires.
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